Vehicle-loaded parallel flow type heat exchanger

Abstract

Here is disclosed a vehicle-loaded heat exchanger comprising a plurality of tubes extending in parallel with one another, an inlet header pipe and an outlet header pipe respectively connected to opposite ends of said tubes, wherein each of the header pipes is longitudinally divided into two components, namely, a tank and an end plate both presenting outwardly swelling walls and the end plate is integrally joined to the tank with opposite joint side edges of the former bearing against the inner surfaces of corresponding opposite joint side edges of the latter. With such heat exchanger, parallel flows of coolant passing through a plurality of tubes are established between the inlet and outlet header pipes and thereby desired heat exchange is obtained. To install the header pipes, the end plate, one component of each header pipe, is formed by pressing with openings for insertion of the tubes and then the end plate is joined as by brazing to the tank with the joint side edges of the end plate being placed inside the joint side edges of the tank.

What is claimed is: 
     
       1. A condenser for use in an automobile comprising: a pair of header pipes each consisting of a tank portion and an end plate;   a plurality of parallel flat tubes extending between said head pipes for supporting coolant flows,   said header pipes having an oval cross-section,   said end plates having a radius of curvature which is smaller than that of said tank portions, and   said end plate being continuously outwardly curved and joined to said tank portion such that inside surfaces of opposite joint edges of said tank portion are overlapped on outside surfaces of opposite joint edges of said end plate, whereby said tank portion reinforces said end plate to withstand high pressure of said coolant flows.   
     
     
       2. The condenser of claim 1, wherein said joint edges of said tank portions have an L-shaped cross-section extending outwardly from a side edge thereof in parallel to a major axis of said oval cross-section and then downwardly in perpendicular to said major axis.